Ch 21 Our Solar System

Saturn's rings are made mostly of_____.

Chunks of ice orbiting a planet's equator are called

Aside from Earth, which inner planet once had water on its surface?

Which processes occurs because a planet or another space body is hot inside?

Which of these appears in Earth's atmosphere?

The four largest planets.

The planet with two moons is _____.

The processes that shape mountains and valleys on Earth, other planets, and moons.

How is a moon different from a planet?

Even though all orbits are ellipses, what shape is a typical planet's orbit most like?

Which process occurs only when a small space object interacts with a large space body?

An AU is the average distance between

All the gas giants have __________ and rings.

Earth is unique among the planets because of___________.

Which planets have a clockwise (cw) rotation?

Which of the following planets has no atmosphere?

How far, in AU, is Earth from the Sun?

What is the name of the third planet from the Sun?

How is Venus's atmosphere different from the other terrestrial planets?

Solid, rocky space object orbiting between Mars and Jupiter.

Which planet is recognized by the "great red spot?"

A brief streak of light from a falling space object is a ______.

What are the white stripes of Jupiter and the white spots on Neptune?

The smallest planet, in diameter, is 

Uranus is different from most other planets because it

Both comets and asteroids ____________.

What do all four terrestrial planets have that gas giant planets do not have?

Why doesn't Mercury have any volcanoes anymore?

The atmospheres of the gas giants cannot escape into space because____________.